Br?nsted酸型离子液体催化酯化反应的研究  

Study on the esterification catalyzed by Br?nsted acid ionic liquid

作　　者：沈康文 曾丹林 许可 裴阳 杨媛媛 Shen Kangwen;Zeng Danlin;Xu Ke;Pei Yang;Yang Yuanyuan(School of Chemistry and Chemical Engineering,Hubei Key Laboratory of Coal Conversion and New Carbon Material,Wuhan University of Science and Technology,Wuhan 430081)

机构地区：[1]武汉科技大学化学与化工学院湖北省煤转化与新型炭材料重点实验室,武汉430081

出　　处：《化工新型材料》2018年第12期193-196,共4页New Chemical Materials

基　　金：国家自然科学基金(21473126);湖北省教育厅基金项目(B2014094)

摘　　要：以1,3-丙烷磺内酯、三甲胺或三乙胺为主要原料制备了系列具有Brnsted酸性的4种离子液体。采用傅里叶红外光谱(FT-IR)和核磁共振(NMR)对离子液体进行了结构和酸性表征。并将其用于催化甲醇与油酸的酯化反应。研究结果表明,制得的4种离子液体的催化活性都较为优越,在反应温度60℃,反应时间3h,制得的离子液体N-(3-磺酸基)丙基三甲胺硫酸氢盐([TMPSA][HSO_4])用量为7.5%(wt,质量分数),醇酸摩尔配合比8∶1的条件下,[TMPSA][HSO_4]对醇酸酯化反应的转化率可达97.17%,且离子液体循环使用5次后,仍能保持较高的催化活性。Four functionalized Br?nsted acidic ionic liquids were synthesized by using 1,3-propanesultone and trimethylamine or tri-ethylamine as starting materials,and the structures and acidities of these ionic liquids were characterized by infrared spectromet(FT-IR)and nuclear magnetic resonance(NMR).The ionic liquid was used to catalyze the esterification reaction of oleic acid with methyl.The resuits indicated that The ionic liquid showed high catalytic activity and when the reaction temperature 60℃,the reaction time 3 h,the mole ratio of 8∶1,the reaction conditions of catalyst was 7.5 wt%,the yield of ethyl oleate could reach 97.17%.The ionic liquid can still retain high catalytic activity after reusing for at least 5 times.

关 键 词：离子液体 催化 酯化 

分 类 号：O621.251[理学—有机化学]